Improvement in machines for lining pasteboard



G. H. DICKERMAN.

Improvement in Machines for Lining Paste'board.

Patented March 5, 1872.

v W. ilmwv UNITED STATES PATENT QFFIGE.

IMPROVEMENT lN MACHINES FOR LlNlNG PASTEBOA'RD.

Specification forming part of Letters Patent No. 124,258, dated March 5, 1872.

To all whom it may concern Be it known that I, GEORGE H. DICKER- MAN, of Somerville, in the county of Middlesex and State of Massachusetts, have invented certain Improvements in Machines for Cementing Continuous Webs of Thin Paper to Sheets ofPa-steboard; and I do hereby declare that the following, taken in connection with the drawing which accompanies and forms part of this specification, is a description of my invention suflicient to enable those skilled in the art to practice it.

In the manufacture of paper-boxes and for other purposes, it is desirable to coat with thin paper, (which is supplied to the trade in rolls of suitable width, containing great length of web,) comparatively coarse sheets of pasteboard or straw-board. To cement such paper or other suitable webs to such sheets, (which are of comparatively small area or size,) with facility, smoothness, and dispatch, I have devised the machine described beyond, and in its peculiarities of detail and arrangement the gist of invention is found.

The drawing is a central vertical longitudinal section of a machine embodying my improvements, in which machine, mounted in bearings on a suitable frame-work, a, may be seen the roll b, carrying the long web of thin paper 0, said web passing over directing-rolls d and e, to and partly around feed-rolls covered with rubber. is feed-roll is marked f, and its cooperating roll 9, and

both are connected by gearing so as to revolve in the direction of the arrows thereon marked, and at the same surface-speed. Directly opposite the bite of these rolls is atable, 1, on which a pile of sheets to be surfaced may be placed, and from which the sheets are fed one after another to the action of the rolls f and g. Beneath the roll f is located the cementreceptacle h, and a feeding or distributingroll, 1', is made to turn therein, being driven by a gear on its shaft, meshing into the gear on the shaft of roll f, or in any other suitable and efficient manner. The rolli has its bearings so arranged that they are made to move toward or from the roll f by the rotation of screws, one of which, seen in the drawing, is marked j, the pair of screws being similar and rotated alike. The means -I employ for rotating said screws are equal bevel-pinions on the screw-shafts meshing into equal bevel-gears on the'shat't k. The nearer the roll iis located to the roll f the thinner will be the film of paste or other cement left upon the web 0, and the thickness or amount of the cement will be increased by drawing roll '5 from roll f.

When the end of a new web is to be introduced between the bite of rolls fend g, or when the web breaks between the bite and the roll I), the distrilmting-roll is drawn back a considerable distance, atfording facility for adjustment of the web end with reference to the bite of rolls f and g. The rubber-covered pressure feed-roll g is arranged so that it may be forced toward feed and bed-rollf by means of screws ope 'a-tive against the hearings or boxes of roll g, so that any desirable degree of pressure may be brought upon the line where union takes place between the sheets m and the web 0.

On the table I is an adjustable gauge, a, against which one edge of each sheet is kept when feeding it to the bite of the rolls j'g. The roll 1? is covered with a yielding material, so thatin-deliT'eTiiT g the cement directly upon the web c, as it passes around the yieldingsurfaced feed and bed roll f the paste or glue is evenly spread, while the amount so spread is regulated by the relative distances between the axes of rolls f and 2'. The sheets m, being fed to the bite of rolls f and g, and being pressed directly upon the freshly-cemented surface of web c by the yielding surfaces of said rolls, the parts of the web and sheets are brought into close contact with the interposed cement, and the web lies smoothly on the sheets without ridges, or air-bubbles, or blisters. From rolls f and g the surfaced sheets at pass directly to rolls 0 0, from which, by conveying-bands p or endless aprons passing over other rolls (1 q, they are conveyed through or to any suitable dry-room or space, or other suitable drying apparatus.

In practice I bring the carrying device as near as possible to the rolls f and 9, so as to receive therefrom, with little or no sag, the lined' or covered sheets of pasteboard. The table Z is made movable for convenience in obi-aining access to the end of the Web when introducing it to the bite of rolls f and g, and also to give facility for filling the paste-tank h.

I claim- 1. In a machine for uniting a continuous web of paper to separate sheets of pasteboard, I claim the combination, with the paper-feeding bed-roll f, of the roll 2 for distributing the cement directly from the trough to the continuous or surfacing web.

2. Also, the described arrangement of the elastic-surfaced, paper-feeding bed-roll f, the elastic-surfaced pressure-roll 9 having provision for adjusting the pressure, and the rolls 0 0 q q, and endless conveying bands 1) 12.

GEO. H. DICKERMAN.

Witnesses:

J. B. GROsBY, M. W. FROTIIINGHAM. 

